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[PATCH] lockdep: debug_locks check after check_chain_key

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In __lock_acquire check_chain_key can turn off debug_locks, so check is
needed to assure proper return code.

Signed-off-by: Jarek Poplawski <jarkao2@o2.pl>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Jarek Poplawski 2007-02-20 13:58:00 -08:00 committed by Linus Torvalds
parent 34173a4aad
commit 60e114d113
1 changed files with 4 additions and 0 deletions
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4
kernel/lockdep.c
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@ -2228,6 +2228,10 @@ static int __lock_acquire(struct lockdep_map *lock, unsigned int subclass,
curr->lockdep_depth++;
check_chain_key(curr);
#ifdef CONFIG_DEBUG_LOCKDEP
if (unlikely(!debug_locks))
return 0;
#endif
if (unlikely(curr->lockdep_depth >= MAX_LOCK_DEPTH)) {
debug_locks_off();
printk("BUG: MAX_LOCK_DEPTH too low!\n");